greave, knee-pads, buskins
袚 centers on protective legwear worn in ancient contexts: greaves, knee-pads, or buskins. The meanings all refer to armor or coverings for the lower legs.
袚 combines 衤 (clothing) with 犮, which likely contributes the sound. The character originally referred to a type of leg covering or protective garment.
The clothing radical 衤 on the left suggests something worn, and the right side 犮 looks like a person with protective gear on their legs. Picture ancient knee-pads and greaves made of cloth and leather.
For ハツ, imagine putting on greaves before a battle and hearing the sharp sound of the straps snapping: 'hats!' The sound cues ハツ while the clothing radical ties it to the protective gear.